Last updated: July 2026

## Device Overview – Screen: 4.95-inch OLED, 960×544 – CPU: Unisoc Tiger T618 (2×A75 + 6×A55 @ 2.0 GHz) – GPU: Mali-G52 @ 850 MHz – RAM: 4 GB LPDDR4X – Storage: 128 GB eMMC – Battery: 5000 mAh – OS (stock): Android 12 – Extra: Hall effect joysticks, 6-axis gyro, Wi-Fi 5, Bluetooth 5.0

Source: Official Anbernic specs

## Recommended Software: GammaOS GammaOS (based on LineageOS 19.1 / Android 12) is the preferred custom firmware for the RG505 / RG505M.

### Key Features – Debloated and performance-optimised – Includes Google Services + Play Store (or Lite version without them) – Daijisho frontend pre-configured with RetroArch – Magisk / root included – 60 Hz refresh rate fix (stock runs at 61.2 Hz) – Oversharpening display fix – Better analog stick calibration – Performance governors enabled by default – Experimental GPU drivers (from Retroid Pocket 3+) – L2/R2 button fixes – AdGuard ad-blocking enabled by default – Aurora Store included

### Performance Modes (Hotkey) Hold **R3 + L1 + R1** to cycle between: – Max Performance – Normal Performance – Power Save

### Button Layout Toggle Hold **L3 + L1 + R1** to switch between Xbox and Nintendo button layouts. Setting is remembered after reboot.

## RetroArch Controls (GammaOS) – Hotkey: **Select** button – Open RetroArch menu: **L3 + R3** – While holding hotkey (Select): – L1 = Slow motion – L2 = Load state – R2 = Save state – R1 = Fast forward – X = Show FPS – Y = Screenshot

## Useful Links – GammaOS GitHub: https://github.com/TheGammaSqueeze/GammaOS – RG505 Unbricker (restore stock firmware): https://drive.google.com/file/d/1WNildo8TZDW6L4tzY9SDEjL3NhPGg_gG/view

## Notes – BIOS files for RetroArch systems must be added manually. – SafetyNet / Zygisk can be enabled in Magisk settings if needed for certain apps/games. – No built-in button-to-on-screen mapping tool — alternatives available in the Play Store / Aurora Store.